Electric-arc lamp.



T. E. ApA'Ms; ELECTRIC ARC LAMP. APPLIUATION ITIIE D JULY 14, 1909.

' Patented July 12, 1910.

' y INVENTOR Allvrney JTNESSES ploying THOMAS ADAMS, OF CLEVELAND, OHIO;

ASSIGNOR TO THE ADAMS-BAGNALI ELECTRIC COMPANY, OF CLEVELAND, OHIO.

ELECTRIC-ARC LAMP.

Patented July 12, 1910.

Application filed July 14, 1909. Serial No. 507,648.

To all whom it may concern:

Be it known that I, THOMAS EDGAR Anureyof Cleveland, in the county of Cuya hoga and State of Ohio, have invented certain new and useful Improvements inElectrio-Arc Lamps; and'I do hereby declare the following to be a full, clear, and exact description of'thc invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in electric arc lamps and more particularly to that type in which one of the electrodes is provided with lateral projection: removable successively by heat. from the arc to accom plish the feeding of said electrode.

It has heretofore been proposed to provide an electrode with laterally projecting metal pins IGlllOVtllDlG by heat from the arc but with prior constructions, the electrodes had to be handled with reat care to avoid distortion of: thelatcra Lprojections, such distortion being apt to render the lamp cmthe electrode inoperative. To make the ribs or projections as heretofore constructed, sufficiently strong to withstand the usual treatment, would require more metal than would be conducive to a perfect j are; when the electrode is in use in a lamp, and the large amount of molten metal would be likely to spot the globe or lodge, as cinder, between the electrode and prevent relighting.

The object of my present invention is to avoid the difficulties incident to prior coni structions and to provide an electrode with l laterally projecting devices adapted to be l removed by heat from. the arc and to so conj struct such. devices that they shall be mechanically strong with the use of a minimum amount of metal, V i A further object is to so construct an are l lamp of the type referred to that the lateral j projections and the stop with which they cooperate shall be so located relatively to each l other and to the arc that said slop will not i be unduly affected by heat from the arc and l thus permit the accurate feeding of the electrodes the lateral projections become successively detached from the electrode. Y

With these objects in. view the invention: consists in certain novel features of construction and combinations of parts as hereinaft er set forth and pointed out inthe claims. I

l l i i i l l .scries of diagonal In the accompanying drawings, Figure 1 is an enlarged view showing portions of two electrodes and the relation of my improvements to the upper electrode. Fig. 2 is a transverse sectional view. face view of the blade which. forms the lateral projections for the electrode, and

Fig. 4 is a view of an arc lamp showing the application of my improvements thereto; 1, 2, represent the upper and lower elec trodes respectively, and in the present instance, the upper electrode is provided with a longitudinal groove 3 for the reception of a member 4 at one edge of a blade such as shown in Fig. 3. This blade is made of suitable sheet metal and. provided with a slots 5,the portions of the metal separating said slots constituting projections (3 which are disposed diagonally or upwardly inclined with relation to the axis of the blade and the electrode. At their inner ends, the projections 6 are integral with the member 4. which is disposed in the groove of the electrode.

The metal of the blade which forms the outer ends of the slots 5 constitutes a mem- Fig. 3 1s a" her 7 but this member is slit or out between solder connections will be melted before the adjacent lower pro ection shall have been i melted to cause the severance of the latter fromthe elect-rode. j

The upper electrode 1 having the lateral projections above describbd secured thereto, may be inserted into a tube 5) which forms a portion of the framework of a lamp,

said tube having a lateral longitudinal enlargement 10 for the accommodation of the.

lateral projections on the electrode. The upper end of the electrode '1 is provided with a contact device 11 to engage the tube 9. and the lower end of, the electrodo is adapted to pass through a suitable opening in the floor plate 12 of insulatingmaterial,

secured to the lower portion of the lamp frame or tube 9. The floor plate supports a stop-block 13 having a beveled face 14: upon which the lower end of the member 7 having a lateral tooth 8 below the lowermostprojection 6 rests. By (providing the stopv block 13 with the beve face 14, the member 7 at the outer ends of the projections 6 is caused to bear against the wall of the enlarged portion 10 of tube 8 so as to cause the latter to absorb a portion of the heat from the outer ends of the projections 6 and thus facilitate the steady feeding of the electrodes as the projections 6 melt, away. By making the projections 6 extend upwardly and outwardly obliquely to the axis of the electrode, the stop block can be located an appreciable distance from the are, thus encore of a solenoid 23,the latter being in the -"this chain, after passing over a pulley 18 abling the durability of said stop block.

The lower electrode 2 is supported by a suitable holder at the lower end of a rod 15 which is vertically movable through a tube or sleeve 16 supported by the base of the lamp frame. To the upper end of this rod. ower endof'a chain 17 is attached and supported by the top bracket 19 of the lamp,

is provided with a weight 20. A clutch 21 engages the rod '15 and is connected with 30 one endof a lever 22 pivotally supported between its ends by the lamp frame. The

other arm of this lever is connected with the cluded in series with the electrodes. A stop 2 1 is provided for the clutch 21. 1 j Assuming that the electrodes are in contact when the lamp is not in circuit,-it will be seen that when the lamp circuit is closed the solenoid 23 will be energized and, raising its core, will cause the descent of the clutch 21 and with the latter the descent of the rod 15 and the lower electrode 2, thus establishing the arc. 'As the upper electrode becomes consumed and the arc lengthens, the projections 6 will be melted by heat eesnae from the arc and thus permit the up er electrode to feed down by gravity step y step.

It will be apparent that the regulation of a the are between the periods at which the projections 6 becdmeremoved, can be effected by the movements of the lower electrode under the control of the solenoid 23.

Having fully described my invention what I claim as new and desire to secure by Letters Patent, is,

1. The combination with an electrode, of

a blade secured thereto and comprising" members parallel with the axis of the electrode, and projections spaced-apart and connecting said members.

ablade secured thereto, said blade compris- 1 ing parallel members, one of which is secured to the electrode, and projections connecting said members and spaced apart, the outer member being out between the projections and united wit solder.

3. The combination wit an electrode, of

a blade secured thereto, said blade comprise ing a strip of metal havingv diagonalslots axis of the electrode and ob ique projections, and a stop to coeperate with said blade.

forming parallel members arallel with the i 4. The combination with an electrode, of I a blade secured thereto, said blade comprising two membersand diagonal'projections' connecting the same and spaced apart, the

outer member having slits intersectingthe' Witnesses J. H. Worms, J. R. Onrn r'r.

slit portionsof the outer,

- THOMAS EDGAR ADAM. v.

. i 60 2? The combination with an electrode, of 

